Cleanup MetaAddr after security fixes

[teor2345]

Motivation

After the MetaAddr refactors in PRs #2273, #2275, and #2276, we want to clean up the code a bit.

Solution

These changes should all be made in separate PRs.

Refactoring

• Split a MetaAddrEvent enum out of MetaAddrChange, and turn change into a struct containing an addr and event #3248
  • For details see Security: stop gossiping failure and attempt times as last_seen times #2273 (comment)
• Create a "services implemented by Zebra" constant, and use it to replace PeerServices::NODE_NETWORK #3249

DateTime32 and Duration32

• Replace From for DateTime32 and From for Duration32 with the existing from_seconds method #3250
• Make LIVE_PEER_DURATION into a Duration32, and convert to std::time::Duration using into #3251

Optimisation

• Optimise the AddressBook returning the next peer by using min() rather than collect::<BTreeSet>().next()
• Remove unnecessary pass-by-reference on Copy types, guided by the following lints:
  • trivially_copy_pass_by_ref
  • ref_option_ref
  • large_types_passed_by_value(avoid-breaking-exported-api = false)

Documentation

• Replace unquoted MetaAddr and quoted `MetaAddr` with rustdoc links to MetaAddr: [`MetaAddr`] using fastmod
  • we might want to try the doc_markdown lint here, but it might have a lot of false positives

TODO: add other tasks here as needed

Alternatives

These changes are optional, but they'll make the code easier to maintain.

[teor2345]

This task doesn't contribute directly to NU5 validation or client work, so I'm removing it from the sprint.

In the meantime we should do these tasks as needed for other work.

[mpguerra]

@teor2345 or @jvff can one of you please split this up into a number of issues for re-triage?

[teor2345]

Done!